One-way valve structure and reciprocating pump reliable in work

Abstract

The invention provides an one-way valve structure and a reciprocating pump reliable in work. The one-way valve structure comprises a valve seat with an inlet, a valve cover with an outlet, a valve ball for opening and closing the inlet and a connecting pipe connected with the outlet, wherein, a buffering sealing piece is arranged between the valve cover and the valve seat, the buffering sealing piece is located at the inlet and at least part of the buffering sealing piece protrudes out of the upper surface of the inlet, so that the valve ball firstly contacts with the buffer sealing piece to form buffer when returning to the valve seat and then contacts with the valve seat to form sealing, therefore, the valve ball can firstly contact with the buffer sealing piece when returning to the valve seat, good buffer is formed for returning of the valve ball, the valve ball is prevented from being bounced by the valve seat, the inlet can be closed in time, the material backflow amount is greatly reduced, and the control precision is improved; moreover, when the valve ball is in contact with the valve seat, no particle exists on a sealing surface, the sealing is tight, the valve seat cannot cause serious cavitation erosion to fail even if the flow speed is very high under the high-pressure working condition, and the service life is prolonged.

Description

technical field [0001] The invention relates to the field of reciprocating pumps, in particular to a check valve structure and a reciprocating pump with reliable operation. Background technique [0002] Reciprocating pumps are indispensable core equipment in petroleum, petrochemical, thermal power, chemical, environmental protection and other industries. Among them, mud pumps, ore slurry pumps, and coal slurry pumps are widely used in petroleum, mining, coal chemical and other industries. [0003] The above-mentioned reciprocating pumps have a common feature: the conveyed materials contain solid particles and have a large conveying flow rate. Therefore, the inlet and outlet check valves of this type of pump are easily stuck and worn when conveying materials containing particles. The disadvantages are: [0004] 1. When the valve ball returns to the seat, the contact and collision between the valve ball and the valve seat will cause a rebound. Heavy traffic. [0005] 2. If...

AI Technical Summary

Problems solved by technology

[0004] 1. When the valve ball returns to the seat, the contact and collision between the valve ball and the valve seat will cause a rebound. high traffic

[0005] 2. If there are particles on the sealing surface when the valve ball is in contact with the valve seat, the seal is not tight, and the flow rate is very high under high pressure conditions, and the valve seat will cause serious cavitation erosion and fail

[0006] 3. Irregular collision and vibration of the valve ball produces a large noise

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